A trendline is one of the most important tools in technical analysis because it helps identify the market’s direction, strength, and possible reversal points. By connecting higher lows in an uptrend or lower highs in a downtrend, a trendline shows whether buyers or sellers are in control. It also acts as dynamic support or resistance, where prices often react before continuing the trend. Traders use trendlines to find entry points near support, exit points near resistance, and confirmation of breakouts or breakdowns when the line is decisively crossed. In simple terms, a trendline helps turn random price movement into a clearer trading structure.